Android第一流窗口控制_Android

Android顶级窗口控制

顶级窗口会显示在所有视图之上，可以利用此特性用来显示优先级高的业务。

我把它可分为常规式顶级窗口和遮罩式顶级窗口。

常规式顶级窗口不影响其他组件获取焦点(图1)；遮罩式顶级窗口顾名思义就是把其他组件都遮住了(图2)。

??????????????????????????? 常规式顶级窗口图1

?????????????????????? ???? modal style 图2

实现方式：

先启动一个服务(aidl)，由该服务去绘制窗口，并对外提供绘制接口(实现见下面代码)；

单独写一个应用(如上)，用来连接服务并显示顶级窗口。

服务端控制顶级窗口显示与销毁的代码：

/** * 该服务用来测试顶级窗口的设置. * @author QiShuang *  */public class MService extends Service {	private static final int WRAP = WindowManager.LayoutParams.WRAP_CONTENT;	private static final int FILL = WindowManager.LayoutParams.FILL_PARENT;		/** 常规的顶级窗口--该顶级view下的部件可以继续操作 */	public static final int TYPE_TOPLEVEL_WIN_NORMAL = 1;		/**遮罩式(模式)顶级窗口--该顶级view下的部件被遮住，不可以操作 */	public static final int TYPE_TOPLEVEL_WIN_MODAL = 2;		private WindowManager wm;	private View subView;	@Override	public void onCreate() {		super.onCreate();		showToast("remote service onCreate...");	}	@Override	public void onStart(Intent intent, int startId) {		super.onStart(intent, startId);		showToast("remote service onStart...");	}	@Override	public IBinder onBind(Intent intent) {		showToast("remote service onBind...");		return iBinder;	}	@Override	public boolean onUnbind(Intent intent) {		showToast("remote service onUnbind...");		return super.onUnbind(intent);	}	@Override	public void onDestroy() {		super.onDestroy();		showToast("remote service onDestroy...");	}	public void showToast(String msg) {		Toast.makeText(this, msg, Toast.LENGTH_SHORT).show();	}	private Handler handler = new Handler() {		public void handleMessage(Message msg) {			switch (msg.what) {			case 1: {// drawTopWindow				wm = (WindowManager) getSystemService(Context.WINDOW_SERVICE);				subView = getLayout();				WindowManager.LayoutParams mWmlp = getWinLayParams(msg.arg1);				wm.addView(subView, mWmlp);				break;			}			case 2: {// cancelTopWindow				if(wm!=null && subView!=null){					wm.removeViewImmediate(subView);					subView=null;				}				break;			}			}		};	};	private IBinder iBinder = new IService.Stub() {		public void drawTopWin(int type) throws RemoteException {			Message msg = new Message();			msg.what = 1;			msg.arg1 = type;			handler.sendMessage(msg);			//10s后消失			handler.postDelayed(new Runnable() {				public void run() {					handler.sendEmptyMessage(2);				}			}, 10000);		}		public void cancelTopWin() throws RemoteException {			handler.sendEmptyMessage(2);		}	};	// 构造布局View	private View getLayout() {		LinearLayout layout = new LinearLayout(this);//		layout.setLayoutParams(new LinearLayout.LayoutParams(WRAP,WRAP));		layout.setBackgroundColor(Color.YELLOW);		layout.setOrientation(LinearLayout.VERTICAL);		layout.setGravity(Gravity.CENTER);				TextView tx = new TextView(this);		tx.setLayoutParams(new LinearLayout.LayoutParams(200,100));		tx.setTextColor(Color.BLUE);		tx.setGravity(17);		tx.setText("我站在山峰之巅!!!");				Button btn = new Button(this);		btn.setLayoutParams(new LinearLayout.LayoutParams(WRAP,WRAP));		btn.setText("OK");		btn.setOnClickListener(new Button.OnClickListener() {			public void onClick(View v) {				handler.sendEmptyMessage(2);			}		});				layout.addView(tx);		layout.addView(btn);		return layout;	}	private LayoutParams getWinLayParams(int type) {		WindowManager.LayoutParams wlp = new WindowManager.LayoutParams(FILL,WRAP);		wlp.alpha = 0.5f;		wlp.dimAmount = .5f;		if(type==TYPE_TOPLEVEL_WIN_MODAL){//模式顶级窗口			wlp.flags = WindowManager.LayoutParams.FLAG_DIM_BEHIND;//任何部件都在其之下，可以通过dimAmount(0~1.0)设置透明度					}else if(type==TYPE_TOPLEVEL_WIN_NORMAL){//常规顶级窗口			wlp.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE; // 不抢聚焦点		}		wlp.flags = wlp.flags				| WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH;		wlp.flags = wlp.flags				| WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS; //allow window to extend outside of the screen				wlp.type = WindowManager.LayoutParams.TYPE_SYSTEM_ALERT; //系统提示类型		wlp.width = WRAP;//WindowManager.LayoutParams.MATCH_PARENT;		wlp.height = WRAP;//WindowManager.LayoutParams.MATCH_PARENT;		wlp.gravity = Gravity.CENTER;		return wlp;	}}

step1：设置WindowManager.LayoutParams属性(flags、type很重要)；

step2：定义要在窗口中显示的view；

step3：将view加入到WindowManager中。

此功能会涉及到以下2个权限，加入到manifest.xml中即可：

<uses-permission android:name="android.permission.INTERNAL_SYSTEM_WINDOW" />
?<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />

1 楼凌波微步1206 2012-03-19

74.行 private IBinder iBinder = new IService.Stub() {

IService.Stub看不懂！出错了麻烦楼主讲解下

2 楼 xiaofeng001 2012-03-28

凌波微步1206 写道

74.行 private IBinder iBinder = new IService.Stub() {

IService.Stub看不懂！出错了麻烦楼主讲解下

好久没有搞Android了，记得IService.Stub是根据IService.aidl文件自动生成的一个代理类。你可以在aidl文件中定义业务接口，我只在其中定义了drawTopWin()和cancelTopWin()方法,希望对你有用。